I don't know what I've done personally to get my recommended videos/channels in the state it's in.
I got recommended this banger of a vid. Fewer than 10k views too.
Maybe because I've left likes on videos? Or I've rewatched particular videos? I know places like twitter and Instagram will also feed you content if it's been on your screen for longer, so maybe holding your mouse over a thumbnail or even clicking on such videos is helping to clog your feed with shit? I don't know everything they take account of when deciding what content you might like watching but pay consideration to every variable. Maybe they'll go away if you actually ignore it?
Another thing I've done is
I've doomscrolled through shorts once or twice, so I think leaving some likes there has lead to Youtube recommending me shit that might actually cater to my interests? I don't think they'd ever organically recommend any politically right-wing content (unless it's culture war, gaming oriented like Asmongold, not stuff that matters more) but you could stop getting left-wing content. So yeah, I'd recommend leaving more likes on videos, even if you don't necessarily 'like' it, but if it engages you for a moment, makes you chortle, or is vaguely interesting, it lets youtube know you want more stuff like that and not commiewank. If you have videos in your favourites with no likes on them, that'd be a good place to start.